Web Spring - hqzhang/cloudtestbed GitHub Wiki

Step 1 - Setup Java Development Kit (JDK)
         http://www.oracle.com/technetwork/java/javase/downloads/index.html
Step 2 - Setup Eclipse IDE
         https://www.eclipse.org/downloads/download.php?file=/oomph/epp/oxygen/R2/eclipse-inst-win64.exe
Step 3 - install MySQL and create table
         https://dev.mysql.com/get/Downloads/MySQL-5.5/mysql-5.5.58-win32.msi
   run: mysql -u root -p  with password
   create database userdb;
   CREATE TABLE user(
   USER_ID   INT NOT NULL AUTO_INCREMENT,
   FIRST_NAME VARCHAR(20) NOT NULL,
   LAST_NAME VARCHAR(20) NOT NULL,
   GENDER VARCHAR(20) NOT NULL,
   CITY VARCHAR(20) NOT NULL,
   PRIMARY KEY (USER_ID)
);
REPLACE INTO `user` (`user_id`, `first_name`, `last_name`, `gender`, `city`) VALUES
 (906, 'Ankush', 'Thakur', 'male', 'gurgaon'),
 (907, 'Anamika', 'Singh', 'female', 'meerut'); 
  
Step 4 - Download all libraries
         1.Apache Common Logging API: 
             http://www-eu.apache.org/dist//commons/logging/binaries/commons-logging-1.2-bin.zip
         2. Spring package: 
             https://repo.spring.io/release/org/springframework/spring/5.0.2.RELEASE/spring-framework-5.0.2.RELEASE-dist.zip
         3. download mysql connector:
             https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.45.zip
         
Setp 5 - Creat a Project: Dynamic Web Project
        and add libraries above into lib directory.
Web.xml for define  <web-app> /<servlet> 
Bean.xml/spring-servlet.xml for define <beans> /<bean>
<?xml version = "1.0" encoding = "UTF-8"?>
<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" 
   xsi:schemaLocation = "http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd ">
   <!-- Initialization for data source -->
   <bean id="dataSource" 
      class = "org.springframework.jdbc.datasource.DriverManagerDataSource">
      <property name = "driverClassName" value = "com.mysql.jdbc.Driver"/>
      <property name = "url" value = "jdbc:mysql://localhost:3306/pets"/>
      <property name = "username" value = "root"/>
      <property name = "password" value = "xxx"/>
   </bean>
   <!-- Definition for studentJDBCTemplate bean -->
   <bean id = "studentJDBCTemplate" 
      class = "com.tutorialspoint.StudentJDBCTemplate">
      <property name = "dataSource" ref = "dataSource" />    
   </bean>     
</beans>
1.define object
public class Student {
   private Integer age;
   private String name;
   private Integer id;
}
2.define access object
public interface StudentDAO {
   public void setDataSource(DataSource ds);
   public void create(String name, Integer age);
   public Student getStudent(Integer id);
   public List<Student> listStudents();
   public void delete(Integer id);
   public void update(Integer id, Integer age);
}
3. define access object implements
public class StudentJDBCTemplate implements StudentDAO {
   private DataSource dataSource;
   private JdbcTemplate jdbcTemplateObject;
   public void setDataSource(DataSource dataSource) {
      this.dataSource = dataSource;
      this.jdbcTemplateObject = new JdbcTemplate(dataSource);
   }
   public void create(String name, Integer age) {
      String SQL = "insert into Student (name, age) values (?, ?)";
      jdbcTemplateObject.update( SQL, name, age);
      System.out.println("Created Record Name = " + name + " Age = " + age);
      return;
   }
   public Student getStudent(Integer id) {
      String SQL = "select * from Student where id = ?";
      Student student = jdbcTemplateObject.queryForObject(SQL, 
         new Object[]{id}, new StudentMapper());      
      return student;
   }
   public List<Student> listStudents() {
      String SQL = "select * from Student";
      List <Student> students = jdbcTemplateObject.query(SQL, new StudentMapper());
      return students;
   }
   public void delete(Integer id) {
      String SQL = "delete from Student where id = ?";
      jdbcTemplateObject.update(SQL, id);
      System.out.println("Deleted Record with ID = " + id );
      return;
   }
   public void update(Integer id, Integer age){
      String SQL = "update Student set age = ? where id = ?";
      jdbcTemplateObject.update(SQL, age, id);
      System.out.println("Updated Record with ID = " + id );
      return;
   }
}
4.define a mapping
public class StudentMapper implements RowMapper<Student> {
   public Student mapRow(ResultSet rs, int rowNum) throws SQLException {
      Student student = new Student();
      student.setId(rs.getInt("id"));
      student.setName(rs.getString("name"));
      student.setAge(rs.getInt("age"));
      return student;
   }
}
5. define a main
public class MainApp {
   public static void main(String[] args) {
      ApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml"); //load beans:
      StudentJDBCTemplate studentJDBCTemplate = 
         (StudentJDBCTemplate)context.getBean("studentJDBCTemplate"); //get JDBC class
      
      System.out.println("------Records Creation--------" );
      studentJDBCTemplate.create("Zara", 11);
      studentJDBCTemplate.create("Nuha", 2);

      System.out.println("------Listing Multiple Records--------" );
      List<Student> students = studentJDBCTemplate.listStudents();
      for (Student record : students) {
         System.out.print("ID : " + record.getId() );
         System.out.print(", Name : " + record.getName() );
         System.out.println(", Age : " + record.getAge());
      }
}